Results on the influences of various factors

Among the influencing variables listed in Table 14.1, the rotary speed of the propellers, N, actually reflects the influence of the impinging velocity, Mol while for convenience of operation N is taken as the operation variable. For a given SCISR u0 is a monodrome function of N, and for the reactor used in the present investigation the curve shown in Fig. 10.8 in Chapter 10 is essentially applicable for the relationship between u0 and N. 

The experimental results obtained in this stage are described below. 

Experimental conditions for study on the influences of various effects 

The other operating conditions for investigation the influence of the feeding mode are CCl,ci2 = 0.1 kmol-m-3, T - 20°C, N = 1000 rpm, pH = 14, and CuCl2 to KBH4 mole ratio 1 2. The major results are as follows  

In Mode I (feeding time 1 min), the results are similar to those obtained in the repeated verifying experiments mentioned in the previous section. The TEM photo of the product shows particle-clumping and the results of X-ray diffraction (XRD) analysis indicate that the product consists mainly of copper powder with a little Cu20. The X-ray spectrum of the product obtained in this feeding mode is shown in Fig. 14.3, which indicates the major part being Cu, with little Cu20 and no CuO. 

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